There is plenty of complaints about how social media-texting in particular—may be harming children's social and intellectual development. But a new study suggests that constant instant messaging (IM'ing) and texting among teens may also provide benefits, particularly for those who are introverted (内向的).

British researchers studied instant messages exchanged by 231 teens, aged 14 to 18. All of the participants were “regular” or “extensive” IM'ers. In the U. S., two thirds of teens use instant messaging services regularly, with a full third messaging at least once every day.

The researchers analyzed 150 conversations in the study, and reported the results in the journal Computers in Human Behavior. In 100 of these chats, the study participant began IM'ing while in a negative emotional state such as sadness, distress or anger. The rest were conversations begun when the participant was feeling good or neutral. After the chat, participants reported about a 20% reduction in their distress—not enough to completely eliminate it, but enough to leave them feeling better than they had before reaching out.

“Our findings suggest that IM'ing between distressed adolescents and their peers may provide emotional relief and consequently contribute to their well-being,” the authors write, noting that prior research has shown that people assigned to talk to a stranger either in real life or online improved their mood in both settings, but even more with IM. And people who talk with their real-life friends online also report feeling closer to them than those who just communicate face-to-face, implying a strengthening of their bond.

    Why would digital communication do better than human contact? The reasons are complex, but may have something to do with the fact that users can control expression of sadness and other emotions via IM without exposing emotional elements like tears that some may consider as embarrassing or sources of discomfort. Studies also show that the anonymity (匿名) of writing on a device blankets the users in a sense of safety that may cause people to feel more comfortable in sharing and discussing their deepest and most authentic feelings. The research has shown that expressive writing itself can vent the stress and provide a sense of relief—and doing so, knowing that your words are reaching a sympathetic friend, may provide even more comfort and potentially be therapeutic(治愈的). Researchers also found that introverted participants reported more relief from IM conversations when they were distressed than extroverts did. Susan Cain, author of Quiet wrote recently for TIME: Introverts are often overfilled with thoughts and care deeply for their friends, family and colleagues. But even the most socially skilled introverts sometimes long for a free pass from socializing or talking on the phone. This is what the Internet offers: the chance to connect—but in measured doses and from behind a screen.

    Are you a different person when you speak a foreign language? That's just one of the questions the New Yorker's writer and native North Carolinian Lauren Collins explores in her autobiography, about her tough efforts to master French after marrying a Frenchman whose name —Olivier—she couldn't even pronounce properly. When in French ranges from the humorously personal story to a deeper look at various theories of language acquisition and linguistics (语言学).

    The couple met in London “on more or less neutral ground: his continent, my language.” But the balance shifted when they moved to Geneva for Olivier's work. The normally voluble (健谈的) Collins found herself at a loss — “nearly speechless.” The language barrier, and her dependence on her husband for simple things like buying the right cut of meat worsened her mixed feelings about “unlovely, but not ridiculous” Geneva. She comments, “Language, as much as land, is a place__To be cut off from it is to be, in a sense, homeless.”

    Her sense of alienation (疏离感) leads to an examination of America's miserable record when it comes to foreign languages, “Linguists call America 'the graveyard of languages' because of its singular ability to take in millions of immigrants and make their native languages die out in a few generations,” Collins writes. Educated in Wilmington, N.C., and at Princeton, she could — like the vast majority of Americans — only speak their mother tongue.

    Eight months after she moved to Switzerland, Collins gives up on the natural acquisition of language and finally attends a French course. As she struggles with grammar and vocabulary, Collins notes smartly that vert (green),verre (glass), ver (worm), vers (toward), and vair (squirrel) compose a quintuple homonym (同形异义). “Although it's difficult, French can try” she says.

    French is actually considered among the easiest languages for an English speaker to learn, especially compared to Arabic or Mandarin Chinese. Collins, whose notably rich English vocabulary includes glossolalia (nonsense speech) and shibboleth (catchword or slogan), finds plenty of terrific French words to love. She writes, “English is a trust fund, an unearned inheritance (遗产), but I've worked for every bit of French I've banked.”

    Unlike Jhumpa Lahiri, who became so hooked on Italian and used it to write In Other Words, Collins's goals for learning French were more modest, “I wanted to speak French and to sound like North Carolina.” She also wanted to be able to deal with chimney sweeps and butchers, communicate with her in-laws, and “to touch Olivier in his own language.” She admits that she feels different speaking French. ''Its austerity (朴素) made me feel more confused.”

    Readers looking for the romantic spark of classic cross-cultural love stories featuring an outgoing American and a shy Frenchman will find flashes of it here. Among the many cultural differences the couple argue over are her enthusiastic American habit of applying the verb love to express enthusiasm for shoes, strawberries, and husbands alike. But there's far more to Collins, book than fantastic comedy, and those who have experienced linguistic crossings themselves tend to find particular resonance (共鸣) in its inquiry into language, identity, and transcultural translation.

Arranged by chapters named for verb tenses, When in French works its way from The Past Perfect (Le plus-que-parfait) to The Present (Le Present) and The Conditional (Le Conditionnel). Collins ends on a delightful note with Le Futur—fitting for a new mother about to move with her hard-won French husband, French language, and Swiss-born daughter to the French-speaking city of her dreams, Paris.

    Want to stay away from colds? Put on a happy face.

    Compared to unhappy people, those who are cheerful and relaxed are less likely to suffer from cold, according to a new study. It's possible that being happy helps the body fight illnesses, say the researchers from New York University.

    “It seems that positive feelings may reduce the danger of illness,” said the study's chief researcher Sheldon Cohen.

    In an earlier study, Cohen found that people who were cheerful and lively caught coughs and colds less often. People who showed positive feelings were also less likely to tell their doctors that they felt ill.

    In this study, Cohen's study interviewed 193 adults every day for two weeks. During the interviews, the people told researchers about the happy or sad feelings they had that day.

    After the two weeks, the people were given colds by doctors and had to stay alone in a room for six days.

    The result showed that everyone in the study was equally likely to get ill. But for people who said they felt happy during the research period, their illness was less serious and lasted for a shorter time.

    Cohen believes that when people experienced positive feelings, their body may produce a chemical that helps fight illness and disease. So if you are worried about your health, look on the bright side more often.

    “We all know that exercise is good for us, but can you get the benefits without actually doing the exercise?” asks Michael Mosley.

    Having a hot bath or a sauna is a good way to soothe your limbs after exercise, but what happens if you do it instead of exercise? Dr. Steve Faulkner of Loughborough University asked me to take part in an experiment comparing the relative benefits of having a long, hot bath versus an hour of hard pedalling.

    For this study I join a group of volunteers who have all been fitted with monitors which continuously record blood sugar levels. Keeping your blood sugar levels within the normal range is an important measure of your “metabolic” fitness.

    The first part of the experiment is very relaxing, consisting of having a long, hot bath. While I sit in the bath, which they keep at 40℃, Steve closely monitors my core temperature. Once it has risen and stayed there, I am allowed out.

    A couple of hours after my bath I have a light meal. Since we want to see how having a hot bath compares with exercise we repeat the experiment.

    So what's the result?

    “One of the first things that we were looking at,” Steve says, “is the energy expenditure while you're in the bath and what we found was an 80% increase in energy expenditure just as a result of sitting in the bath for the course of an hour.”

    This is nothing like as many calories as cycling for an hour (which comes out at an average of 630 calories) but we do burn 140 calories, the equivalent of a brisk 30-minute walk.

The surface of Venus has never seemed very hospitable. Temperatures change around 470℃(900°F), the result of a runway greenhouse effect, and the pressure of its atmosphere, thick with carbon dioxide and sulfuric acid(硫酸), is some 90 times that of Earth's. Lead(铅) would flow like water on Venus, and water cannot have existed in liquid form for perhaps a billion years.

    Now NASA'S Magellan spacecraft seems to have found one more horror in the nasty landscape: active volcanoes. Last week the space agency released the first detailed map of Venus and the most dramatic images ever made of its surface. The picture offer the best evidence to date that a planet once assumed dead is actually a lively pot of geological change.

    The most amazing image is of Venus's second tallest mountain, Maat Mons, which rises 8km(5 miles) . Most of the planet's many peaks, including 9.5-km-(6-mile-) high Maxwell Montes, look bright in the radar pictures Magellan takes from its orbit above the permanent could cover. That means they are strong reflectors of radar waves. But Maat Mons is dark; like the Stealth bomber, it absorbs much of the radar falling on it.

    This interesting fact, say project scientists, is a strong hint that the mountains has recently been covered with lava(熔岩). Rock that sits on the surface of mountaintops appears to weather quickly in the hot , chemically reactive atmosphere, creating a soil that is rich in iron sulfide(硫化铁). It is this mineral, the scientists believe, that can easily be seen on radar. If Maat Mons doesn't have any, it has probably been resurfaced, perhaps within the past few years.

    Such resurfacing has undoubtedly taken place in Venus lowlands: earlier images of the planet showed vast areas that are remarkably free of craters(火山坑). That would be easy to explain on a Planet like Earth, where cratering from meteor strikes is erased by steady erosion. But while there is some evidence of wind erosion on Venus, the best explanation for the lack of cratering is periodic lava flow. Magellan has found direct evidence of such flows, including domelike upwellings and hardened streamed of rock trailing down the sides of Venusian peaks. There are also signs of other geologic activities, including dramatic faulting and several distinct incidents of mountain building. But the evidence can't indicate whether they really occurred millions of years ago. The case for active Venusian volcanoes is not yet proved, but Magellan, which is now well into its second complete survey of the planet's surface, may eventually settle the issue.

    It's really true what people say about English politeness: it's everywhere. When squeezing past someone in a narrow aisle, people say "sorry". When getting off a bus, English passengers say "thank you" rather than the driver. In Germany, people would never dream of doing these things. After all, squeezing past others is sometimes inevitable, and the bus driver is merely doing his job. I used to think the same way, without questioning it, until I started travelling to the British Isles and came to appreciate some more polite ways of interacting with people.

    People thank each other everywhere in England, all the time. When people buy something in a shop, customer and shop assistant in most cases thank each other twice or more. In Germany, it would be unusual to hear more than one thank you in such a conversation. British students thank their lecturers when leaving the room. English employers thank their employees for doing their jobs, as opposed to Germans.

    Another thing I observed during my stay was that English people rarely criticize others. Even when I was working and mistakes were pointed out to me, my employers emphasized several times but none of their explanations were intended as criticism. It has been my impression that by avoiding criticism, English people are making an effort to make others feel comfortable. This also is showed in other ways. British men still open doors for women, and British men are more likely to treat women to a meal than German men.